Hi @tpi16
Thanks for posting.
Unfortunately Internet Explorer does not fully support Flexbox. (Can I use... Support tables for HTML5, CSS3, etc)
There are still a lot of bugs on IE’s end with Flexbox that they haven’t addressed.
I would also check caniuse for the font issue you mentioned.
Try logging into Webflow in Safari and checking the Designer. Flexbox has settings that display differently in Safari. You should be able to see the issues and make adjustments accordingly.
Regarding the extra margin/padding, Can you see a px change inspector? Or does it show the same and render differently?
Hope this helps! 